History of Aviation, Rare Stamps and Postal History of the World, Part 2
Lot 716:
1930 (May 25-June 6), 1st Europe – Pan America Flight cover from Rio to Friedrichshafen, franked by three values, including two Zeppelin stamps, violet confirmation marking and Condor label is on reverse, Friedrichshafen machine ”6.6.30” drop, returned to US by ship with green special Zeppelin ”Jun.18.30” ds, mostly VF, Est. $150-$200, Sc. #4CL1, 4CL3
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